[pct-l] Waterproof Stuff Sacks?

[res46 at cornell.edu (Rebecca Emily Selling)]

Hi All,
    I'm also currently deciding on a down vs. synthetic sleeping bag. 
Does anyone know if waterproof stuff sacks are made by anyone? That
would help solve the dilemma.  A trash bag can work wonders, but also
rips easily and is harder to compress to a small size.  I'm currently
leaning towards a down bag with a stuff sack/trash bag combo, but a
waterproof stuff sack would be cool.  Any input?  Thanks,
Becky Selling